K 10 svn:author V 6 qingli K 8 svn:date V 27 2008-12-22T01:56:56.701472Z K 7 svn:log V 238 Provide a condition variable to delay the cloned interface destroy operation until the referenced clone device has been closed by the process properly. The behavior is now consistently with the previous release. Reviewed by: Kip Macy END